Jab or tumbler closttbe



W. A. LORENZ.

JAR 0R TUMBLER CLOSURE.

APPLICATION FILED MAR. 29. I918- Patented Nov. 25, 1919.

WILLIAM A. LORENZ, OF HARTFORD, CONNECTICUT.

JAB. OR TUMBLER- CLOSURE.

Specification of Letters Patent.

Patented Nov. 25, 1919.

Application filed March 29, 1918. Serial No, 225,416.

To all whom it may concern:

Be it known that 1, WILLIAM A. LORENZ, a citizen of the United States,residing at Hartford, in the county-of Hartford and State ofConnecticut, have invented a new and useful Improvement in Jar orTumbler Closures, of which the following is a specification.

This invention relates to the construction of closures for foodcontaining jars and tumblers which are held sealed by atmosphericpressure.

The object of the. invention is toso form such closures that they may becheaply made of thin metal, readily sealed by apparatus commonly usedfor this purpose, easily opened whether applied to jars or tumblers whenit is desired to remove the contents, and will protect the edges oftumblers from breakage if dropped or roughly handled.

In attaining this end the center of the cap is made conical ordome-shaped in order that it may be stamped from thin sheet metal andhave suflicient strength to prevent it from collapsing under atmosphericpressure after air has been exhausted from the inside of the receptacleand the scaling is effected. A curved inwardly opening annular groove isformed near the edge of the cap for receiving the packing gasket whichspreads over the upper edge of the jar or tumbler when sealed, and theedge of. the

flange around the cap is flared or bell-shaped so that below the packinggasket it stands away from the wall of the jar or tumbler and provides ashoulder which is serviceable and itscap in unsealed relation. Fig. 2 isa similar view showing the jar and cap in sealed relation. Fig. 3 .showson larger scale a section of the edge of the jar and cap in sealedrelation. Fig. 4 shows a section of a tumbler containing food and havingits cap laid on in unsealed position. Fig. 5

is a slmilar view showing the cap sealed on the tumbler. Fig. 6 is anenlarged view of' a small section of the tumbler and cap in sealedrelation. Fig. 7 shows a capped tumbler upset. Fig. 8 is a detailed viewshowing a method of removing a cap from a jar.

The cap 1 which is stamped from thin sheet metal is circular in outlineand its center 2 is convexed-conical or dome-shaped so that while themetal 1 s thln it cannot collapse, under atmospheric pressure whensealed upon a receptacle. Around the cap tacle preferablybut a smallarea of the gasket will rest upon" the outer corner of the upper edge ofthe receptacle, as shown in Figs. 1 and 4. This permits aim to bereadily withdrawn from the interior of the receptacle by the commonlyemployed exhausting apparatus. After air has been sufiicie ntlywithdrawn from the interior of the receptacle and the closure is presseddown the gasket spreads itself over the upper' edge and-on the insideand outside of the mouth of the receptacle a suflicient distance toinsure an eflicient hermetic closure, as indicated in Figs. 2 and 5.

shoulder 8 on the outside below the rim, a knife -blade or otherimplement 9 may be inserted between the oustanding edge of the cap andthe shoulder on the jar andsufficient leverage obtained to renderbreaking the seal of the jar easy, as shown in Fig. 8. Or.

if the receptacle is a tumbler the outstanding edge of the cap is so farbeyond the wall of the tumbler that a shoulder is provided which may befirmly seated on a table or other object and the tumbler drawn away from"the cap so as .to break the seal.

Furthermore, the more or less flexible projecting edge of. the capforms-a cushion whlch protects the edge of the? tumbler if it With a capof this construction if the receptacle is in the form of a jar with a isdropped or should be knocked over, as shown in Fig. '7, or when twotumblers are bumped together.

The invention claimed is:

A food containing package hermetically sealed by atmospheriqpressure,comprising the combination of a Jar or tumbler and a thm metallic caphaving an inwardly opening annular groove near its edge with a 0flexible packing gasket located in said groove and fitting upon therimof the receptacle, said cap flaring outwards-beyond the gasket andterminating in a continuous annular thin edge that is greater indiameter than any other part of the cap and stands away from'the Wall ofthe receptacle and forms a yielding protecting hood for the rim of thereceptacle upon which the cap is held.

WILLIAM A. LORENZ.

